Sometimes when I fly it I see people getting out of the Chinook infront of the chopper. So might want to look into that at least..

It's the alternate exit, for when the back has been blocked by terrain/a static. It's the alternative to them hearing the 'breeeeeee' (shock paddles) meaning they can't exit. When I was practicing backwards touchdowns, I found out that if you don't do it right, your passengers will come out the front and fall to their deaths